These are nice, easier levels. For newbies, they make an easy, fun challenge.
For the Time Trial, levels #1, #2, and #6 would be nice.
If you want to add more features to your levels, don't forget about the custom bitmaps, invisable lines, and obstacles.

Chandler and Black Mountain are longer for sure. Good technique will get them done a lot quicker. As with any level with some practice. Good suggestion Kristopher on using some of the other obstacles/decorations. SZ, when you have the next version with new features, are you going to put the level editor out there early, so we can build some new levels with the new features?

I have done Black Mountain in 1:45, so it is all in the practice (I think it could be done maybe 1:35 or better). It is like Cave Dweller (a level I don't really like for what it is worth). My time there is almost 4 minutes, but the the best is 2 minutes (true I haven't spent a lot of time improving my score--but you get the picture). I think 1:35 would be faster than the best score on one or two of the levels that will be in the new level pack (Breaking School, Dragon Flame). Yes, 3 minutes is too long, and so is 2.